Torque sensor based on magnetoelastic effect

Abstract

A torque sensor based on a magnetoelastic effect disclosed by the present invention comprises a stepped shaft, the stepped shaft comprises an elastic shaft and a fixed disc, the side surface of the elastic shaft is provided with an amorphous alloy detection sheet, the periphery of the elastic shaft is uniformly distributed with a plurality of coil supports, the coil supports are fixed on the fixed disc, and the coil supports are fixed on the fixed disc. A magnet exciting coil is arranged on the coil bracket; a circuit board is arranged above the coil bracket; according to the invention, the magnitude of the torsional force is detected based on the inverse magnetostrictive effect, and the device has incomparable advantages compared with other measurement methods, is simple in installation and maintenance, strong in anti-interference capability, good in durability, capable of realizing non-contact measurement, easy to develop towards miniaturization, and especially suitable for online monitoring of torque, and in addition, the magnetoelastic non-contact torque measurement is adopted, so that the measurement accuracy is improved. The control error caused by the reduction of the system rigidity can be effectively reduced.

Description

technical field [0001] The invention relates to a torque sensor, in particular to a torque sensor based on a magneto-elastic effect. Background technique [0002] A torque sensor is a device and device that can sense torque and convert it into a usable signal according to a certain law. It is usually composed of sensitive elements and elastic elements. Torque sensors are widely used in the field of robotics. They are generally installed inside each joint of the robot. They can comprehensively sense the magnitude of the torque that the robot bears when it interacts with the external environment, and provide force-sensing information for the compliance control of the robot. [0003] At present, several main methods of torque measurement include strain type, photoelectric type, capacitive type, electromagnetic type and magneto-elastic type. [0004] The torque measurement of the strain gauge sensor is to form a measuring bridge by pasting the strain gauge on the elastic shaft....

AI Technical Summary

Problems solved by technology

Its advantages are high precision, low cost, and reliable performance; the disadvantage is that the response time is long, and the changes to the measured axis are large, which affects the system.

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